Its not what is on current ice bikes, this looks like Motocross style upside down forks, these can be very expensive and go ito thousands of pounds, and are really impracticle.
The problem with forks is that in speedway they inevitably get bent, therefore you need to straighten them, which at the moment isnt too bad until a certain point.
With Motocross style forks, the problem is that MX bikes are unlikely to be involved in head ons with a fence, therefore are less likely to get bent. So they will be more seceptible to breakage from this type of damage.
Their inclusion does open up the possibility of MX parts and Maanufactures maybe looking into the market
Swings and Roundabouts, like anything I think